The effects of severe weather are felt every year by many South Africans. To obtain critical weather information, the SAWDOS use voluntary weather observers. These volunteers help keep their local communities safe and informed by providing timely and accurate reports of severe weather to the SAWDOS for publication on the Blog. The SAWDOS is a non-profit organization that renders a FREE COMMUNITY-BASED SERVICE.

Saturday, 26 January 2013

SOUTH INDIAN OCEAN AREA : TROPICAL DISTURBANCE SUMMARY (26 January 2013)

THE AREA OF CONVECTION PREVIOUSLY LOCATED NEAR 21.3S 41.8E,
IS NOW LOCATED NEAR 19.8S 41.3E, APPROXIMATELY 330 NM WEST OF
ANTANANARIVO, MADAGASCAR. ANIMATED MULTISPECTRAL SATELLITE IMAGERY
DEPICTS A PARTIALLY-EXPOSED, BUT ELONGATED LOW-LEVEL CIRCULATION
CENTER (LLCC) WITH PERSISTENT DEEP CONVECTION. A 260706Z AMSU-B
MICROWAVE IMAGE REVEALS A SLOWLY CONSOLIDATING LLCC WITHIN A BROAD
AREA OF TURNING THAT SPANS ACROSS THE MOZAMBIQUE CHANNEL WITH SOME
FORMATIVE CONVECTIVE BANDING OVER THE NORTHWEST QUADRANT. A 260705Z
ASCAT PASS SHOWS 20 TO 25 KNOT WINDS ASSOCIATED WITH THIS ELONGATED
CIRCULATION. THE LLCC IS LOCATED JUST UNDER THE SUBTROPICAL RIDGE
AXIS GIVING WAY TO MODERATE TO STRONG (20 TO 30 KNOTS) EASTERLY
VERTICAL WIND SHEAR WITH STRONG DIFFLUENCE ALOFT. MAXIMUM SUSTAINED
SURFACE WINDS ARE ESTIMATED AT 20 TO 25 KNOTS. MINIMUM SEA LEVEL
PRESSURE IS ESTIMATED TO BE NEAR 1004 MB. THE POTENTIAL FOR THE
DEVELOPMENT OF A SIGNIFICANT TROPICAL CYCLONE WITHIN THE NEXT 24
HOURS REMAINS LOW.

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